Organic Chemistry - basic doubts

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Q3)the given IUPAC name is wrong.: 3- Methyl-4-ethylheptane.what is the correct IUPAC name?

Its correct name is 4-Ethyl-3-methylheptane.

while doing nomenclature of the substituents you should take them in alphabetical order(here e comes before m)

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Q1)For detection of hydrogen and carbon in compounds why do we take Cuo three times the weight of the organic compound?

A small quantity of pure and dry compound is mixed with about ten times its weight of

copper oxide(CuO). The mixture is taken in a hard glass test tube fitted with a delivery tube

having a small bulb. The other end of the tube is immersed in freshly prepared lime water. In

the bulb of delivery tube, a small amount of anhydrous copper suphate is placed. The mixture

of qualitative analysis heated strongly when carbon and hydrogen present are oxidised to

carbon dioxide and water respectively.

C+2CuO -> CO₂+ Cu

2H + CuO -> H₂O +Cu

Hope this clears your query. [1]

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what is the IUPAC Name.

In resonance material it is given primary prefix is cyclo.isnt it wrong?Shouldnt the root word be cyclo.

basic doubts